Encryption is a serious business!
the issue should be discussed, approved, sponsored, by the highest powers of Your organization NOT ON A FORUM
how to do it in cobol is just a low level technicality!
more important are the legal implication, according to Your organization profile ( Financial ? ) !
but it' s pity that people always forget about the organizational issues
YES... it can be done if You have the right software and skills
NO... nobody with a bit of good sense will tell You how to do it on a forum!
if You have been assigned the task by Your high powers...
well I am speechless for the carelessness with which You/Your organization tackle the issue
Apologies a ton if m wrong.
You are not wrong,
You ( worse ... Your organization ) just do not have the overall competence for such a complex issue!
a side note... Your organization should be prepared to pay quite higher fees
for consultancies on cryptographic issues ( probably in the range of 4 to 5 thousands $ per day )